Plato's Cave

Plato's allegory of the Cave

In Plato's Allegory of the Cave, prisoners are chained to and have lived their whole life staring at a wall in a cave. All they know are the shadows on a wall, which are objects carried on the backs of prisoners walking in front of a fire behind the wall. They mistake these shadows for reality. If onae prisoner were to gaze behind the wall and into the fire, their eyes would burn and they would retreat back to their cave. However if a prisoner were to be forcefully removed from the cave, experiencing the outside world, they understand that the shadows were illusions. However, upon their return to the cave, they would be blind as their eyes are no longer adjusted to the light. The prisoners that remained would interpret their blindness as the outside world being dangerous and would therefore kill anyone attempting to leave. 

Plato's allegory represents the jounery from ignorance to enlightenment. 

Pink Floyd

Pink Floyd is an English rock band formed in London in 1965. They are considered one of the first British psychedelic groups, and are known for their compositions, sonic experiments, philosophical lyrics, and elaborate live performances.